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AX3103A

AXElite
Part Number AX3103A
Manufacturer AXElite
Description PWM Control 3A Step-Down Converter
Published Jul 18, 2014
Detailed Description AX3103A PWM Control 3A Step-Down Converter  GENERAL DESCRIPTION AX3103A consists of step-down switching regulator with...
Datasheet PDF File AX3103A PDF File

AX3103A
AX3103A

Overview
AX3103A PWM Control 3A Step-Down Converter  GENERAL DESCRIPTION AX3103A consists of step-down switching regulator with PWM control.
These devise include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc.
AX3103A provides low-ripple power, high efficiency, and excellent transient characteristics.
The PWM control circuit is able to the duty ratio linearly form 0 up to 100%.
This converter also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup.
An enable function, an over current protect function and short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be reduced.
Also, an internal compensation block is built in to minimum external component count.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators.
They serve as ideal power supply units for portable devices when coupled with the SOP-8L package, providing such outstanding features as low current consumption.
Since this converter can accommodate an input voltage up to 23V, it is also suitable for the operation via an AC adapter.
 FEATURES - Input voltage：3.
6V to 23V - Output voltage：0.
8V to VCC - Duty ratio：0% to 100% PWM control - Oscillation frequency：500KHz typ.
Soft-start (SS), Current Limit (CL), Enable function.
Thermal Shutdown function.
Short Circuit Protect (SCP).
Built-in internal SW P-channel MOS.
Low ESR output capacitor (Multi-layer chip capacitor (MLCC) application.
SOP-8L Pb-Free package.
1/10 Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.
1.
5 Aug.
10, 2010 AX3103A  BLOCK DIAGRAM SW Oscillator Circuit Reference Voltage with Soft Start + FB Vss Vcc PWM Switched Control Circuit Thermal Shutdown VEN Current Limit EN Comp  PIN ASSIGNMET The package of AX3103A is SOP-8L; the pin assignment is given by: Na...


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